The nonprofit National Butterfly Center has asked a federal judge to stop border wall activity on its property as the Trump administration gears up to build new walls and fencing in South Texas and may soon win funding for more.

President Donald Trump is not giving up on his demand for $5.7 billion to build a wall along the U.S.-Mexico border, saying a physical barrier is central to any strategy for addressing the security and humanitarian crisis at the southern border.

More property owners along the U.S.-Mexico border in South Texas have said they've received notices from the federal government asking to review their land, which could be used for border wall construction.